# ============================================================================
# 110.42.32.207 Nginx 配置
# API 服务�?- 处理所有后�?API 和代理请�?
#
# 部署步骤�?
# 1. 上传到服务器: scp nginx-110.42.32.207.conf ubuntu@110.42.32.207:/tmp/
# 2. 复制配置: sudo cp /tmp/nginx-110.42.32.207.conf /etc/nginx/sites-available/api.conf
# 3. 启用配置: sudo ln -s /etc/nginx/sites-available/api.conf /etc/nginx/sites-enabled/
# 4. 申请证书: sudo certbot --nginx -d api.valuefrontier.cn (或使用其他方�?
# 5. 测试重载: sudo nginx -t && sudo systemctl reload nginx
# ============================================================================

# WebSocket 连接升级映射
map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

# ============================================================================
# HTTP (端口 80) - 重定向到 HTTPS
# ============================================================================
server {
    listen 80;
    server_name api.valuefrontier.cn 110.42.32.207;

    # Let's Encrypt 验证
    location /.well-known/acme-challenge/ {
        root /var/www/html;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

# ============================================================================
# HTTPS (端口 443) - API 服务
# ============================================================================
server {
    listen 443 ssl http2;
    server_name api.valuefrontier.cn 110.42.32.207;

    # SSL 证书配置
    # 方式1: 使用 IP 证书（需要购买）
    # 方式2: 使用自签名证书（CDN 回源可以配置�?HTTP�?
    # 方式3: 如果有域名指向这台服务器，用 Let's Encrypt
    #
    # 临时使用自签名证书（生产环境建议使用正式证书�?
    # sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
    #   -keyout /etc/nginx/ssl/server.key \
    #   -out /etc/nginx/ssl/server.crt \
    #   -subj "/CN=110.42.32.207"
    ssl_certificate /etc/nginx/ssl/api.valuefrontier.cn/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/api.valuefrontier.cn/privkey.pem;

    # SSL 优化
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;

    # 文件上传大小限制（客服图片上传需要）
    client_max_body_size 20M;

    # ============================================
    # CORS 配置（允�?CDN 域名访问�?
    # ============================================
    set $cors_origin 'https://valuefrontier.cn';

    # 如果需要限制来源，取消下面注释
    # set $cors_origin '';
    # if ($http_origin ~* "^https://(www\.)?valuefrontier\.cn$") {
    #     set $cors_origin $http_origin;
    # }

    # ============================================
    # Flask API 代理（本�?gunicorn�?
    # ============================================
    location /api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Origin, Content-Type, Accept, Authorization, X-Requested-With, Cookie' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://127.0.0.1:5001;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Connection "";

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        # 超时配置
        proxy_connect_timeout 60s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    # ============================================
    # WebSocket - Socket.IO (Flask)
    # ============================================
    location /socket.io/ {
        proxy_pass http://127.0.0.1:5001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
        proxy_buffering off;
    }

    # ============================================
    # 实时行情 WebSocket
    # ============================================

    # 上交所行情（本地服务）
    location /ws/sse {
        proxy_pass http://127.0.0.1:8765;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
        proxy_buffering off;
    }

    # 深交所行情
    location /ws/szse {
        proxy_pass http://222.128.1.157:8765;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
        proxy_buffering off;
    }

    # ============================================
    # MCP 服务（本地）
    # ============================================
    location /mcp/ {
        proxy_pass http://127.0.0.1:8900/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Connection '';

        proxy_buffering off;
        proxy_cache off;
        chunked_transfer_encoding on;

        proxy_connect_timeout 75s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;

        gzip off;
        add_header X-Accel-Buffering no;
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, X-Requested-With' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }
    }

    # ============================================
    # 数据服务 API 代理 (222.128.1.157)
    # ============================================

    # 概念板块 API
    location /concept-api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }

        # 隐藏后端返回�?CORS 头（避免重复�?
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://222.128.1.157:16801/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # Elasticsearch API
    location /es-api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, HEAD' always;
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }

        # 隐藏后端返回�?CORS 头（避免重复�?
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://222.128.1.157:19200/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        proxy_buffering off;
    }

    # 新闻搜索 API
    location /news-api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }

        # 隐藏后端返回�?CORS 头（避免重复�?
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://222.128.1.157:21891/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        proxy_connect_timeout 90s;
        proxy_send_timeout 90s;
        proxy_read_timeout 90s;
    }

    # 研报搜索 API
    location /report-api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }

        # 隐藏后端返回�?CORS 头（避免重复�?
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://222.128.1.157:8811/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    # 商品分类 API
    location /category-api/ {
        # 处理 OPTIONS 预检请求
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400;
            add_header 'Content-Length' 0;
            return 204;
        }

        # 隐藏后端返回�?CORS 头（避免重复�?
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;

        proxy_pass http://222.128.1.157:18827/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 统一添加 CORS �?
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;

        proxy_buffering on;
        proxy_buffer_size 128k;
        proxy_buffers 8 256k;
        proxy_busy_buffers_size 512k;
    }

    # ============================================
    # Bytedesk 客服系统代理 (43.143.189.195)
    # ============================================

    location /bytedesk/ {
        proxy_pass http://43.143.189.195/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    location /websocket {
        proxy_pass http://43.143.189.195/websocket;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_connect_timeout 86400s;
        proxy_send_timeout 86400s;
        proxy_read_timeout 86400s;
    }

    location /chat/ {
        proxy_pass http://43.143.189.195/chat/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 替换响应内容中的 IP 地址
        sub_filter 'http://43.143.189.195' 'https://www.valuefrontier.cn';
        sub_filter_once off;
        sub_filter_types text/css text/javascript application/javascript application/json;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    location /config/ {
        proxy_pass http://43.143.189.195/config/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    location ^~ /uploads/ {
        proxy_pass http://43.143.189.195/uploads/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 隐藏后端返回的 CORS 头（避免重复）
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;

        # 统一添加 CORS 头
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Origin, Content-Type, Accept' always;

        proxy_cache_valid 200 1d;
        expires 1d;
        add_header Cache-Control "public, max-age=86400";
    }

    location ^~ /file/ {
        proxy_pass http://43.143.189.195/file/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 隐藏后端返回的 CORS 头（避免重复）
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;

        # CORS 头（解决 ERR_BLOCKED_BY_ORB）
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Origin, Content-Type, Accept' always;

        proxy_cache_valid 200 1d;
        expires 1d;
        add_header Cache-Control "public, max-age=86400";
    }

    location /visitor/ {
        proxy_pass http://43.143.189.195/visitor/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Accept-Encoding "";

        # 替换 JSON 响应中的 IP 地址
        sub_filter 'http://43.143.189.195' 'https://www.valuefrontier.cn';
        sub_filter_once off;
        sub_filter_types application/json;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, X-Requested-With' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 120s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
    }

    location = /stomp {
        # 代理到 bytedesk 的 /websocket 端点
        proxy_pass http://43.143.189.195/websocket;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
        proxy_buffering off;
    }

    location /stomp/ {
        # 代理到 bytedesk 的 /websocket 端点
        proxy_pass http://43.143.189.195/websocket;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }

        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
        proxy_buffering off;
    }

    location ^~ /avatars/ {
        proxy_pass http://43.143.189.195/uploads/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 隐藏后端返回的 CORS 头（避免重复）
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Credentials;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;

        # CORS 头（解决 ERR_BLOCKED_BY_ORB）
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Origin, Content-Type, Accept' always;

        proxy_cache_valid 200 1d;
        proxy_cache_bypass $http_cache_control;
    }

    location /assets/ {
        proxy_pass http://43.143.189.195/assets/;
        proxy_set_header Host $host;

        expires 1d;
        add_header Cache-Control "public, immutable";
    }

    # ============================================
    # 健康检�?
    # ============================================
    location /health {
        return 200 'ok';
        add_header Content-Type text/plain;
    }

    # ============================================
    # 默认返回 404
    # ============================================
    location / {
        return 404 '{"error": "Not Found"}';
        add_header Content-Type application/json;
    }
}